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(ModeL) T. M. BALES & S. 0. LEESON.

DOOR BELL.

No. 351,245. Patented Oct. 19, 1886.

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UNITED STATES PATENT OFFICE.

THOMAS M. BALES AND SILAS O. LEESON, OF DUBLIN, INDIANA; SAID BALESASSIGNOR TO ALBERT SOUTHVQRTH, OF SAME PLACE.

DOOR-BELL.

SPECIFICATION forming part of Letters Patent No. 351,245, dated October19, 1886 Application filed June 23, 1886. Serial No. 206,042. (Model) ToaZZ whom it may concern.-

Be it known that we, THoinAs M. BALES and SILAS O. LEESON, citizens ofthe United States, residing at Dublin, in the county of Wayne and Stateof Indiana, have invented certain new and useful Improvements in Door-Bells; and we do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters or figures of referencemarked thereon, which form a part of this specification.

Figure 1 of the drawings is a representation of this invention and is avertical section. Fig. 2 is a front view, partly broken away to show themechanism.

Our invention relates to door-bells; and it consists in the constructionand novel combination of parts, as hereinafter described, and pointedout in the claims.

Referring by letter to the accompanying drawings, A designates a boardor base, to one face of which the door-bell B and the mechanism foroperating the striker are secured, ready for attachment to the innerface of any door where it may be desirable or necessary to use the doorbell. The board A is secured in place by screws passed through saidboard into the inner face of the door at any suitable point or location.

The striker mechanism comprises two bearing-plates, D E, one of which,D, is a fiat plate of sheet metal, and the other, E, is an angular plateor casting having flanges F, which rest against the base-plate D, screwsG G being passed through both plates D E to secure them in place on theboard A. The spindle H, on which a spur-gear, I, is fixed between thebearing -plates D E, proj ects through the board A, and also through aseat made for it through the door, and this spindle H is provided with aknob, J, which is secured thereon by a set-screw, K.

The striker-arm L is constructed after the style of a pendulum, and isconnected at its upper end to the shaft M of the pallet N,

which engages the spur-gear or scape-wheel I. The striker-arm L issecured near the rear end of the shaft M, and is bent near its upper endtoward the board A, and passes down behind the edge of the alarm-bell B,or between the edge of the bell B and the board A, sufficient spacebeing left for the strikerarm to vibrate freely.

At its lower end the striker-arm L is provided with a rod or elongatedhammer, Q, which, when the striker-arm is oscillated or vibrated, movesin the are of a circle, so that the fiat ends of the hammer will strikethe inner face of the alarm-bell fairly, and will not make a slidingblow thereon, thereby insuring a clear sound when the alarm-bell isstruck by the hammer.

The alarm bell B is secured against the outer end of a sleeve, R, by ascrew, S, passed through a central hole, T, in said bell, and throughthe sleeve B into the board A.

The striker mechanism is preferably covered by a small cap, U, by screwspassed through projecting flanges V at diametrically-opposite sides ofthe cap U. A notch, Z, is made in the edge of the bell-cap U, throughwhich the striker-arm or pendulum passes, and in which it oscillates orvibrates when operated.

The knob may be turned either way, and when so turned will turn thespindle H and the scapewheel I, secured to said spindle, The teeth ofthe scape-wheel engage the pallet N and impart oscillating motion to thestriker.

- Having described this invention, what we claim, and desire to secureby Letters Patent, 1s-

1. The combination, with the base or board having the bearing platessupporting the knob, and the knob-spindle provided with the scape-wheel,and the pallet within the cap, having the strikerarm,with the hammer atits lower end connected to the pallet-shaft, the said pallet being inengagement with the scape-wheel, of the alarm-bell secured upon theouter end of the sleeve by a screw passed through the alarm-bell andsleeve into the base or board, substantially as specified.

2. In a door-bell, the combination, with the In testimony whereof weaffix our signatures rotary knob and its shaft carrying a scapeinpresence of two witnesses. wheel, of a pallet working on saidscape-wheel and carrying rigidly secured thereto a strikerarm, and abell within which the hammer end of the striker works, the wholesupported in Witnesses: a base or bearing adapted to be attached to aJOHN A. GRIFFY,

door, substantially as specified. A. G. COMPTON.

THOMAS M. BALES.

